Sheriff Susan Pamerleau said officers had received a tip that Gonzales, a convicted sex offender who'd failed to register annually and was accused of retaliation and in five vehicle thefts, was at the home in the quiet Northwest Side subdivision near Loop 1604 and Shaenfield Road.

About 6:15 p.m., a team of five warrant officers descended on the home and walked inside the unlocked front door after no one answered their knocks, Pamerleau said.

Knowing that Gonzales was a high-risk fugitive, the pair of warrant officers typically used in a warrant execution was more than doubled. Per department policy effective last year, the officers wore bulletproof vests.

A couple inside the house didn't give officers information on Gonzales' whereabouts, and officers then cleared the home.

As Esquivel entered a laundry room where Gonzales reportedly was hiding, a handgun was fired at him, Berry said.

Other officers then returned fire, but according to Berry, Gonzales was not shot. Details on the injuries he suffered remained unclear.

He was detained at the scene and taken in an ambulance to the hospital.

Berry said the homeowner, Jose Torres, 42, and a woman named Jennifer Wells, 30, also were detained and charged with harboring a fugitive.

A man who said he owned the home but did not want to give his name said Wednesday that he was asleep on a recliner at the time of the incident and that Gonzales, along with a couple of others, rent rooms from him in the two-story house.

“I rented out a room to someone I didn't know,” he said, declining to answer further questions because of a lawyer's advice.

His attorney, David Christian, did not return a phone call seeking a comment.

He was convicted of the crime against the 10-year-old boy in 2004, records show, and was sentenced to six years in prison.

In 2011, Gonzales allegedly stole five motorcycles from a man's garage; three of the motorcycles later were found at his house and another two were sold, according to arrest warrant affidavits.

A man who bought the stolen motorcycles then told officials Gonzales started to threaten him after suspecting he'd talked to police, causing the man to “fear for his safety as Mr. Juan Daniel Gonzales was insinuating that he would be taking care of who had spoken with the cops,” the affidavit states.

Arrest warrants for the vehicle theft charges were signed in December of 2012, the documents show, and he was wanted on retaliation Jan. 19.

On Jan. 31, a warrant was signed for Gonzales' arrest on allegations he failed to properly register as a sex offender.